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Propriétés magnétocaloriques de LaFeCoSiB préparé grâce à un procédé d'atomisation.

Magnetocaloric properties of spherical LaFeCoSiB prepared by atomization process.

Numéro : sect. 2

Auteurs : TAKATA H., IRIE T., NAKAMURA E., et al.

Résumé

Spherical-shaped LaFe(10.98)Co(0.92)Si(1.10)B(0.20) powder was prepared by a rotating disk atomization process. For comparison, ingot sample with thickness of 10 mm was prepared by mold-casting. Both the spherical-shaped powder and the ingot after heat treatment were composed of main phase with a NaZn13 crystal structure, along with La-rich phase and Fe-rich phase. Boron was observed only in the Fe-rich phase. With increasing of annealing time, the maximum values of magnetic entropy change under 0-2 T increased and saturated about 6.2 J/kgK for the spherical-shaped powder and the ingot. Spherical-shaped powder reached the maximum entropy change with shorter annealing time compared with ingot. This might be attributed to well-refined grain size induced by atomization process.

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Pages : 173-178

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Détails

  • Titre original : Magnetocaloric properties of spherical LaFeCoSiB prepared by atomization process.
  • Identifiant de la fiche : 30005513
  • Langues : Anglais
  • Source : 5th International Conference on Magnetic Refrigeration at Room Temperature (Thermag V). Proceedings: Grenoble, France, September 17-20, 2012.
  • Date d'édition : 17/09/2012

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